This study depicts the changing landscape of Western Australia's Yanchep National Park as it has evolved in response to natural processes and human activities. The study also serves to evaluate the level of input Indigenous people have in the management of Australian natural and cultural heritage. The Park was examined by utilising a methodology that combined a cultural geography approach with Structuration Theory. Yanchep National Park is highly suited to this type of investigation because of its close proximity to a major urban centre ( Perth ) and because of the importance of the area to Indigenous people, resulting in a highly visible cultural heritage within the Park.